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The information on the Global Polio Eradication Initiative (GPEI) web site is issued by the World Health Organization for general distribution. The information presented is protected under the Berne Convention for the Protection of Literature and Artistic works, under other international conventions and under national laws on copyright and neighboring rights. Extracts of the information in the web site may be reviewed, reproduced or translated for research or private study but not for sale or for use in conjunction with commercial purposes. Any use of information in the web site should be accompanied by an acknowledgment of WHO as the source, citing the uniform resource locator (URL) of the article. Reproduction or translation of substantial portions of the web site, or any use other than for educational or other non-commercial purposes, require explicit, prior authorization in writing. Applications and enquiries should be addressed to the programme responsible for the page used.

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